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退火Mn1.95Co0.77Ni0.28O4薄膜在近红外和中红外波段的光学机理
投稿时间:2021-11-08  修订日期:2021-12-19  点此下载全文
引用本文:张飞,居靖淇.退火Mn1.95Co0.77Ni0.28O4薄膜在近红外和中红外波段的光学机理[J].红外,2022,43(3):1~7
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作者单位E-mail
张飞 上海海事大学 海洋科学与工程学院 zhangfei@shmtu.edu.cn 
居靖淇 上海海事大学 海洋科学与工程学院  
基金项目:国家自然科学基金项目(61805042);上海市科学技术委员会项目(20ZR1423400);上海深海材料工程技术研究中心项目(19DZ2253100)
中文摘要:采用双洛伦兹模型和有效介质近似(Efficient Medium Approximation, EMA)色散模型对退火的Mn1.95Co0.77Ni0.28O4薄膜在近红外和中红外波段的椭偏数据进行了拟合。通过比较直流电压下测试的电导率与低频下计算的电导率(ω→0)发现,A谐振子主要产生传导电流,B谐振子主要产生位移电流。对于Mn1.95Co0.77Ni0.28O4薄膜,随着退火温度的升高,晶格共振吸收逐渐被电子共振吸收所取代。退火样品的折射率n和消光系数k均由退火过程决定。
中文关键词:Mn1.95Co0.77Ni0.28O4薄膜  椭偏光谱  色散  谐振子  小极化子
 
Optical Mechanism of Annealed Mn1.95Co0.77Ni0.28O4 Thin Films in Near and Mid Infrared Waveband
Abstract:The ellipsometric data in near and mid infrared waveband are fitted by double Lorentz and effective medium approximation (EMA) dispersion models for annealed Mn1.95Co0.77Ni0.28O4 thin films. By comparing the tested conductivity under direct current (DC) voltage with the calculated conductivity at low frequency (ω→0), it is found that A oscillator mainly generates conduction current and B oscillator mainly generates displacement current. For Mn1.95Co0.77Ni0.28O4 thin films, the lattice resonance absorption will gradually be replaced by the electron resonance absorption with increasing annealing temperature. Both the refractive index n and extinction coefficient k of the annealed samples are determined by the annealing process.
keywords:Mn1.95Co0.77Ni0.28O4 thin film  spectroscopic ellipsometry  dispersion  oscillator  small polaron
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